Electronics Calculator Bench

Ohm law, impedance, dividers, filters, timing, and passive component networks

Ohm + Power

Enter any useful pair. The calculator derives voltage, current, resistance, and power.

Waiting for two values

Resistor Network

Each branch is a series string. Branch totals are then placed in parallel.

2 branches

Voltage Divider

Build a resistor ladder with multiple output taps and optional loads on each output.

2 resistor ladder

Series Chain

2 resistors

Output Loads

1 output tap

RLC Impedance

Compare series and parallel RLC behavior at a chosen frequency.

Series network

Passive Filters

Estimate frequency response for passive RC, RL, LC, and RLC networks.

RC low-pass

Target Helpers

quick design estimates

Frequency Plot

gain response

Timing + Energy

Estimate RC timing, capacitor energy, inductor energy, period, and frequency.

RC transient

RC Curve

capacitor voltage over time

LED / Diode Resistor

Size current-limiting resistors for one LED, LED strings, or parallel strings.

single string

555 Timer

Calculate astable frequency/duty cycle or monostable pulse width.

Astable

Op-Amp Gain

Estimate ideal gain and output for common op-amp configurations.

non-inverting

Regulator Heat

Estimate linear regulator dissipation, efficiency, and junction temperature.

thermal estimate

Battery Runtime

Estimate pack voltage, energy, runtime, and load power with regulator efficiency.

1S1P pack

ADC / PWM Helpers

Convert ADC counts to voltage and estimate PWM average plus RC smoothing.

digital helper

Wire / PCB Trace

Estimate copper wire voltage drop and PCB trace resistance/current capacity.

copper estimate

Reactance

Quick capacitive and inductive reactance calculator at a selected frequency.

XL and XC

Resistor Color + E-Series

Decode resistor bands and find nearby standard values.

4 band

Power Supply Ripple

Estimate rectifier reservoir capacitor ripple and approximate DC output.

full wave

Switching Regulator

Estimate duty cycle, inductor ripple, peak current, output ripple, and rough converter stress.

buck

MOSFET / BJT Switch

Check gate/base drive, conduction loss, switching loss, and transistor switch margins.

MOSFET

dB / Signal Level

Convert voltage gain, power gain, dBm, RMS voltage, attenuation, and impedance-related signal levels.

level

I2C / Pull-up / Debounce

Estimate I2C pull-up ranges, bus rise time, sink current, and simple RC debounce timing.

pull-up

Op-Amp Practical Limits

Check gain-bandwidth, slew-rate, output swing, and load-current limits for an op-amp signal path.

limits